July 1981 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

23 sky events total, including 5 moon phases and 1 planetary events.

เหตุการณ์ท้องฟ้า

All times are in local time (Asia/Shanghai)

Group วันที่ Sunrise/Sunset Moonrise/Moonset Moon Phase ปรากฏการณ์ท้องฟ้า

Planetary outlook

July 1981 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: 0.3
กลุ่มดาว: Cancer
Angular diameter: 7.8"
Status: near inferior conjunction

Observation tip: Visible to the naked eye; Mercury stays close to the Sun; best seen at dusk or dawn

Right ascension: 06h07m55s
เดคลิเนชัน: +20°49'54"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Leo
Angular diameter: 11.3"
Status: near greatest western elongation

Observation tip: Very bright, easily visible to the naked eye; Venus is the brightest planet and is best seen at dusk or dawn

Right ascension: 09h25m27s
เดคลิเนชัน: +16°51'29"

Mars

Excellent
Apparent magnitude: 1.6
กลุ่มดาว: Gemini
Angular diameter: 3.9"
Status: near eastern quadrature

Observation tip: Visible to the naked eye; Its reddish appearance is obvious; it is best observed near opposition

Right ascension: 05h50m00s
เดคลิเนชัน: +23°51'56"

Jupiter

Excellent
Apparent magnitude: -1.9
กลุ่มดาว: Libra
Angular diameter: 34.6"
Status: near western quadrature

Observation tip: Very bright, easily visible to the naked eye; Its moons are easy to spot and it is excellent for telescope observing

Right ascension: 12h15m31s
เดคลิเนชัน: -00°19'18"

Saturn

Excellent
Apparent magnitude: 0.9
กลุ่มดาว: Libra
Angular diameter: 16.9"
Status: near western quadrature

Observation tip: Visible to the naked eye; Saturn’s rings require a telescope to see clearly

Right ascension: 12h19m30s
เดคลิเนชัน: +00°27'04"

Uranus

Fair
Apparent magnitude: 5.5
กลุ่มดาว: Scorpius
Angular diameter: 3.9"
Status: near western quadrature

Observation tip: Binoculars are recommended; Binoculars or a telescope are recommended

Right ascension: 15h35m51s
เดคลิเนชัน: -19°06'21"

Neptune

Fair
Apparent magnitude: 7.8
กลุ่มดาว: Sagittarius
Angular diameter: 2.3"
Status: near western quadrature

Observation tip: A telescope is required; A telescope is required; Neptune appears blue-green

Right ascension: 17h28m34s
เดคลิเนชัน: -21°53'12"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Sagittarius
Angular diameter: 11642.3"
Status: Moon illumination 95.2%

Observation tip: Moon illumination 95.2%; good for observing lunar surface detail

Right ascension: 17h48m27s
เดคลิเนชัน: -20°25'44"